davis



(No Model.)

A. DAVIS & J. H. W. MARRIOT 2 Sheets-Sheet 1. T.

'FRAGTION KEY FOB. TYPE WRITING MAGHINES.

Patented May 14, 1889.

3 iii H lul W/ Ill/E8855 I I Um) Attorney'- (No Model.) 2 Sheets-Shet 2..

A. DAVIS 8: J. H; W. MARRIOTT. FRACTION KEY FOR TYPE WRITING MACHINES.

No. 403,179. Patented May 14, 1889.

wi lmeowo, San/wanton, (1/ $113M? QT @W 35 UNITED STATES PATENT OFFICE.

ASA DAVIS AND JAMES H. WVILSON MARRIOTT, OF BALTIMORE, MARYLAND; SAID DAVIS ASSIGNOR TO WARREN H. SADLER, OF SAME PLACE.

FRACTION-KEY FOR TYPE-WRITING MACHINES.

SPECIFICATION forming part of Letters Patent No. 403,179, dated May 14., 1889.

Application filed May 6, 1886. Serial No. 201,324. (No model.) I

To all whom it may concern:

Be it known that we, ASA DAVIS and JAMES H. WILSON MARRIOTT, of Baltimore city, and State of Maryland, have invented a certain new and useful Improvement in Fraction-Keys for Type-WVriting Machines; and we do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it IO appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

Our invention has relation to type-writing machines, and particularly to the double-case Remington type-writer, or those of like construction-that is to say, having type provided with two characters on each key, and a shifting-paper-roll; and it consists in the provision of an extra key, by means of which said shifting paper-carrier may be moved any desired distance less than its whole and regular movement, whereby either of the characters of the type may be impressed on the paper out of line with the regular printing or writing. In the accompanying drawings, Figure 1 is a view, partly in section and partly in side elevation, showing a Remington double-case type-writer with our improvement attached.

Fig. 2 is a View in side elevation and section,

showing the upper-ease or shifting key and its connections to the carriage with our improvement attached, slight modification being made from the construction shown in Fig. 1. Fig. 3 is a view in side elevation of one form of our improved or supplementary fractionkey. Fig. 4' is a view in perspective of our fraction-key. Fig. ,5 is a section on line a: .r of Fig. 2. Fig. 6 is a view in section through part of the said frame of a type-writer, showing a modified form of fraction-key, which by its construction is adapt-ed to be attached to said side frame; and Fig. 7 is a detail view showing the result of the operation of our improved fraction-key. Fig. 8 is a side view of another form of our improved key, the bar to which it is attached being shown in section. Fig. 9 is a top plan view of a corner of the top plate of the machine, showing, partly in section, another means which we may employ for carrying out our invention.

Like letters of reference mark the same parts in all the figures.

In Fig. 1 a type-writer is shown in detail, but this description will not extend beyond those parts necessarily connected with or indispensable to the operation of our improvement.

Referring to the drawings by letter, A is the paper-roll carried by pivoted sliding frame B. The sliding is accomplished by pressure on the key 0 on the forward end of lever D, pivoted at the rear of the machine and having rod 6, connecting it with arm f of elbowlever F, pivoted at e, and having its upper arm, f engaging notch G in frame B. All of these mechanisms are of ordinary construction.

H is a supplementary key pivoted to the I frame on any desirable part, two positions for such pivoting being shown, one on the bar I in Fig. 1, and the other on part J of frame, as in Fig. 6. This key is provided with downwardly-projecting strips or wires a a, which straddle the lever Dof key 0, and the bottom 1) of the key rests on top of said lever. The rear side, 0, of the key serves as a stop by abutting against the frame of the machine. In the construction shown in Fig. 6 the key is pivoted in an upright lug, g, of a clampbar, h, by means of which and the screw 1' it is secured to the frame of the machine, as shown. A set-screw, j, serves to regulate the stopping of the key as desired. We sometimes pivot the key on the round bar I by passing said bar through an eye in the head of the key, as shown in Fig. l, but may slot the head and slip it over the bar, as in Figs.

2 and 4, in which case we may use a spring, K, to prevent displacement; or we may slot it, as shown in' Fig. 3, in which construction a turn-button, Z, is used to secure it in posi tion. The sliding frame B, when thrown back by the action of the upper-case key 0 and its attachments, is returned by the spring K.

In Fig. 8 the slotted key is slipped on the bar from the front and secured in position by a pin passed through it behind the bar.

In Fig. 9 we have shown a key attached to the top plate of the machine, which is made somewhat in the form of an ordinary springbolt, being held in its back or inoperative position by a spring and adapted to be thrown forward against the arm f of elbow-lever F, which carries the shifting-rod. It is limited in its throw by the shoulder under its head, or it may be provided, in place of said shoulder, with an adjustable collar, which is pro- "ided with a set-screw, whereby it may be secured to the key in any desired position.

In Fig. 7 we have shown in outline the relative positions of the paper-roll and type-bar in the several changed positions of the carriage and roll. At 0 we have shown in full lines the position assumed by the roll when the carriage is thrown back to receive the stroke of the uppercase letters on the typebar, as shown at 11. At 0 we show in dotted lines the normal position of the roll-that is, when forward to receive the stroke of the lower case type. Between these two positions, at 0 we show, also in dotted lines, the position (at any point between the two firstnamed positions) assumed by the roll when the carriage is partially thrown back by pressure on our fraction-key. This throw of the carriage is made, preferably, a little less or a little more than one-half the full throw given to the carriage by the upper-case key.

\Vhen the throw is a little less than half, the carriage will be moved to a position which will cause the lower-case letters to strike slightly above the line on which they will strike with the carriage in its normal position.

Vith the throw slightly more than half, the uppercase type will strike slightly below the line in which they would strike when the carriage is thrown back by the pressure on the upper-casekey.

The provision of this key will enable the operator to strike any character or letter in several positions not attainable without it. Some of these maybe enumerated as follows, viz: After writing numerals as, for instance, .21 or 23 or 45-by pressing the fraction-key the letters st or nd or th may be added slightly above the line, converting them into the ordinals 21st or 23rd or 45th, and by throwing the carriage back laterally dots or dashes may be struck, completing these ordinals- -thus, 21 32, sai or when writing dollars and cents, by pressing the fraction-key after writing the number of dollars the number of cents may be struck above the line, making the amount show thus: $6O0. or$l8. If the denominator of the fraction be desired, it may be printed with the lower case in play-thus, $483 and a diagonal line drawn with pen or pencil-thus, $48. /mo; or the machine may be provided with a type to print that line. A space may be made between the numerator and denominator, if desired; but it is not essential. The writing of fractions in this manner is one of the principal uses of our improvement, and is especially in type-writing machines used in commercial life, where great numbers of fractions are necessary. It can also be used in making abbreviations of the following: Account, (.5 care of, postal-card, per cent, (2,; e ual, degrees, may be made not necessary to mention here, but will suggest themselves to the skilled operator.

Having thus described our invention,what we claim, and desire to secure by Letters Patent of the United States, is

1. A fraction-key for type-writing machines, which consists of a lever or key pivoted to a suitable part of the machine and arranged to bear upon the upper-case lever, in combination with the roller-frame of the machine and the uppercase lever connected thereto, whereby the roller-frame may be shifted'with a positive motion backward to any desired position between the upper and lowercase positions, substantially as described.

2. A fraction-key for type-writing machines, which consists of a lever or key pivoted to a suitable part of the machine and arranged to bear upon the upper-case lever, in combination with the roller-frame of the machine, the uppercase lever connected thereto, and an adjustable stop or set-screw co-operating with the fraction-key, whereby the throw of said key and consequent motion of the rollerframe may be determined, substantially as described.

In testimony that we claim the foregoing as our own we hereto afiix our signatures in presence of two witnesses.

ASA DAVIS. J. H. WILSON MARRIOTT.

Witnesses:

THOMAS JOHNSON BIsnoP, J12, JOHN F. 30131. Y

Many more changes a 

